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Finding the Fourth Proportional to 83,478.60, 125,217.90 and 57,040.20

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Solution

The fourth proportional to 83,478.60, 125,217.90 and 57,040.20 is: 85,560.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,478.60 : 125,217.90 = 57,040.20 : x
  2. Step 2: Convert to fraction form
    83,478.60/125,217.90 = 57,040.20/x
  3. Step 3: Cross multiply
    83,478.60x = 125,217.90 × 57,040.20
  4. Step 4: Simplify right side
    83,478.60x = 7,142,454,059.58
  5. Step 5: Solve for x
    x = 7,142,454,059.58/83,478.60
  6. Step 6: Final answer
    x = 85,560.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.